Drill bit with cutter element having multifaceted, slanted...

E - Fixed Constructions – 21 – B

Patent

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E21B 10/08 (2006.01) E21B 10/16 (2006.01) E21B 10/62 (2006.01)

Patent

CA 2598057

A drill bit includes a cutter element having a tapered and faceted side surface extending to a peak, and a polygonal wear face that slopes from the peak toward the cutter element base. The cutter element is mounted in a cone cutter of a rolling cone drill bit and, in certain embodiments, is positioned such that, when the cutter element is in a position farthest from the bit axis, the wear face generally faces and is parallel to the borehole sidewall and the peak engages the borehole bottom.

L'invention porte sur un trépan avec élément de coupe multiface et surface de coupe à sommet incliné, ainsi qu'une surface d'usure polygonale inclinée allant du sommet jusqu'à la base de l'élément de coupe. L'élément de coupe est monté sur un cône de coupe d'un trépan à molettes rotatif et, dans certains exemples de réalisation, est positionné de telle sorte que, lorsqu'il se trouve au point de plus éloigné de l'axe du trépan, la surface d'usure se trouve généralement face au puits de forage et parallèle à sa paroi latérale, alors que son sommêt engage le fond du trou de forage.

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